#include<iostream>
#include<vector>

using namespace std;

int main()
{
  vector<int> v;
  v.push_back(1);
  v.push_back(2);
  v.push_back(3);
  for(unsigned long i = 0; i < v.size(); i++)
  {
    cout << v[i] << " ";
  }
  cout << endl;
  v.clear();
  return 0;
}
